This is a song my Mum sang to me when I was a little nipper; she had learned it when she was young. Unfortunately, this is all I can remember (it was a long time ago). Hope it is the one you are looking for.

By the way, for those of you not from the UK, two-and-six refers to two shillings and sixpence - a lot of money back when Mum was a young girl.

Sambo had an auntie, an auntie very rich,
One day she said to Sambo, "I'll give you two-and-six."
Sambo feeling thirsty, went inside a shop;
Six Lemonades, Two Ginger Beers
And Sambo went off, Pop!

More work for the undertaker,
Another little job for the tombstone maker,
There in the local cemetery, on a tombstone you will see;
"Sambo the Brave and Free."

Sambo had an auntie, an auntie very poor,
One day she said to Sambo, "Go and clean the floor."
Sambo feeling tired tried to go to bed,
Tried to climb the banister and fell down on his head!
Crash! Bang!

More work for the undertaker,
Another little job for the tombstone maker,
There in the local cemetery, on a tombstone you will see;
"Sambo the Brave and Free."